|Publication number||US5165170 A|
|Application number||US 07/788,580|
|Publication date||Nov 24, 1992|
|Filing date||Nov 6, 1991|
|Priority date||Nov 8, 1990|
|Publication number||07788580, 788580, US 5165170 A, US 5165170A, US-A-5165170, US5165170 A, US5165170A|
|Inventors||Sami Sagol, Benjamin Keren, Shai Levi|
|Original Assignee||Keter Plastic Ltd.|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (6), Referenced by (18), Classifications (6), Legal Events (4)|
|External Links: USPTO, USPTO Assignment, Espacenet|
This invention relates to a razor and in particular to a safety razor.
It has been a constant requirement throughout the development of the safety razor to achieve means for improving the surface quality of the resulting shave. In spite of the many developments which have been made in this respect, the only way in which a person can check the actual smoothness of his shave and verify that he has not overlooked part of his beard, is manually to feel his face or to use a mirror after shaving.
Safety razors are normally used wet with the aid of a suitable shaving cream and this makes it difficult for a person to distinguish between those areas of his beard which have been effectively shaved and those which have not, until the shaving cream has been removed.
It is an object of the invention to provide a razor having an integral hair detection means and which provides a real-time feedback during shaving of areas of beard remaining to be shaved.
According to the invention there is provided a razor having an integral hair detection means, the razor comprising:
a razor assembly mounted on a handle for brushing against a surface of a person's face and vibrating in response to contact with hairs thereon,
a pickup coupled to the handle and responsive to vibrations produced therein for generating a corresponding signal, and
audio frequency amplifying means within the handle for amplifying the signal from the pickup as an audio frequency output.
The amplifying means may be either acoustic or electronic. In the event that an acoustic amplifier is used, a flexible membrane may be mounted within a hollow portion of the razor handle and the resulting amplified sound waves may be conducted to a suitable acoustic earpiece by means of a flexible tube.
If the amplifying means is electronic, then either a loudspeaker may be mounted within the handle or, alternatively, an output socket may be provided for electrical connection to a suitable earpiece or an auxiliary loudspeaker.
In order to have a better understanding of the invention and to show how the same may be used in practice, the invention will be described, by way of non-limiting example only, with reference to the accompanying drawings, in which:
FIG. 1 is a partially cut-away pictorial representation showing schematically a first embodiment according to the invention;
FIG. 2 is a partially cut-away pictorial representation showing schematically a second embodiment according to the invention;
FIG. 3 is a partially cut-away pictorial representation showing schematically a third embodiment according to the invention; and
FIG. 4 is a partially cut-away pictorial representation showing a fourth embodiment according to the invention.
FIG. 1 shows a first embodiment of the invention comprising a razor having a handle 1 and a razor assembly 2 mounted at an end thereof. Also mounted on the handle 1 close to the razor assembly 2 is an acoustic pickup 3 coupled to a hollow chamber 4 within the handle 1.
Mounted within the hollow chamber 4 is a thin-walled flexible membrane 5 (constituting an amplifying means) for amplifying sound waves transmitted thereto by the acoustic pickup 3.
The hollow chamber 4 is coupled by a hollow tube 6 within the handle 1 to an output socket 7 permitting an acoustic earpiece 8 to be coupled thereto via a flexible hollow tube 9.
The operation of the razor is as follows. As the razor assembly 2 brushes against the surface of a person's face during shaving, it produces audio-frequency vibrations when it comes into contact with short hairs, or stubble, projecting from the surface of the skin. The resulting audio-frequency vibrations are picked up by the acoustic pickup 3, amplified by the flexible membrane 5 and transmitted through the hollow tube 6 within the handle 1 and the flexible hollow tube 9 to the earpiece 8.
Referring to FIG. 2 of the drawings there is shown a second embodiment of the invention comprising a handle 10 mounted at an end of which is a razor assembly 11. Mounted on the handle 10 adjacent to the razor assembly 11 is a piezo-electric pickup 12 coupled to an input 13 of an electronic amplifier 14, an output 15 thereof being connected to a loudspeaker 16.
The razor assembly 11 vibrates as it brushes against hair or stubble projecting from the surface of a person's face and the resulting vibrations are transduced to an electrical signal by the piezo-electric pickup 12. The electrical signal is amplified by the amplifier 14 and rendered audible by the loudspeaker 16.
FIG. 3 shows a modification of the embodiment described above having a handle 20 mounted at an end of which is a razor assembly 21. Also mounted on the handle 20 close to the razor assembly 21 is a piezo-electric pickup 22 coupled to an input 23 of an amplifier 24 an output 25 of which is connected to an output socket 26. An electric earpiece 27 may be connected to the output socket 26 by means of a flexible electrical cable 28.
The operation of the assembly is essentially the same as that of the second embodiment described above with reference to FIG. 2 of the drawings.
FIG. 4 shows a fourth embodiment according to the invention having a handle 31 mounted at an end of which is a razor assembly 32. Also mounted on the handle 31 close to the razor assembly 32 is an acoustic pickup 33 coupled to a hollow chamber 34 within the handle 31.
Mounted within the hollow chamber 34 close to the acoustic pickup 33 is a microphone 36 (constituting a transducer) which is responsive to audio-frequency vibrations produced by the acoustic pickup 33 for generating an electrical signal. The microphone 36 is coupled to an input 37 of an amplifier 38 having an output 39 connected to an output socket 40. An electric earpiece 41 may be connected to the output socket 40 by means of a flexible electrical cable 42.
In such an arrangement, the razor assembly 32 vibrates when it brushes against short hairs, or stubble, projecting from a person's face. The resulting audio-frequency vibrations are converted by the microphone 36 to corresponding electrical signals which are amplified by the amplifier 38 and rendered audible by the earpiece 41.
It will be understood that variations may easily be effected to the embodiments described above without departing from the spirit of the invention. Thus, for example, whilst in the first and third embodiments a single earpiece is shown coupled to the output socket within the razor handle, a pair of interconnected earpieces may equally well be employed. In the fourth embodiment, an integral loudspeaker may be used instead of an earpiece.
Thus, in accordance with the invention there is provided a razor having an integral hair detection means which permits the user to detect areas of stubble remaining to be shaved during the course of shaving.
|Cited Patent||Filing date||Publication date||Applicant||Title|
|US3736243 *||May 18, 1971||May 29, 1973||Warner Lambert Co||Corrosion protected razor blade|
|US3738000 *||Jul 29, 1971||Jun 12, 1973||Samko A||Disposable razor|
|US3944756 *||Mar 5, 1975||Mar 16, 1976||Electro-Voice, Incorporated||Electret microphone|
|US4473794 *||Apr 21, 1982||Sep 25, 1984||At&T Bell Laboratories||Current repeater|
|US4479239 *||Mar 28, 1983||Oct 23, 1984||Silver Creek Nurseries, Inc.||Sound detecting device|
|US4773158 *||Jun 10, 1987||Sep 27, 1988||Kertzman Harvey Z||Wall mountable safety razor holder|
|Citing Patent||Filing date||Publication date||Applicant||Title|
|US5983502 *||Dec 11, 1997||Nov 16, 1999||U.S. Philips Corporation||Shaving apparatus|
|US6009623 *||Oct 2, 1997||Jan 4, 2000||Warner-Lambert Company||Razor with in situ sensor|
|US6014918 *||Oct 28, 1998||Jan 18, 2000||Warner & Lambert Company||Transcutaneous electric nerve stimulator razor system|
|US6460251||Mar 25, 1998||Oct 8, 2002||Pfizer Inc.||Razor system with worn blade indicator|
|US6497043||Oct 13, 2000||Dec 24, 2002||Sarcos, L.C.||Intelligent shaver|
|US6634104||Jan 4, 2002||Oct 21, 2003||Sarcos Investments Lc||Intelligent shaver|
|US6708408||Aug 14, 2002||Mar 23, 2004||Eveready Battery Company, Inc.||Razor system with worn blade indicator|
|US7472577 *||Jan 23, 2006||Jan 6, 2009||Kao Corporation||Hair sensor|
|US8661687||Sep 20, 2007||Mar 4, 2014||Societe Bic||Blade shaving device and method|
|US9174351||Jun 20, 2012||Nov 3, 2015||May Patents Ltd.||Electric shaver with imaging capability|
|US20060184068 *||Jan 23, 2006||Aug 17, 2006||Kao Corporation||Hair sensor|
|US20100024615 *||Sep 20, 2007||Feb 4, 2010||Societe Bic||Blade shaving device and method|
|US20100186234 *||Jan 28, 2009||Jul 29, 2010||Yehuda Binder||Electric shaver with imaging capability|
|DE102013007223A1||Apr 26, 2013||Oct 2, 2014||Axel R. Hidde||Mechanischer Komfort-Rasierer|
|DE202013003009U1||Apr 1, 2013||Jun 26, 2013||Axel R. Hidde||Mechanischer Komfort-Rasierer|
|EP0906814A1 *||Sep 17, 1998||Apr 7, 1999||Warner-Lambert Company||Razor with in situ sensor|
|WO1997038830A2 *||Apr 1, 1997||Oct 23, 1997||Warner-Lambert Company||Shaving system with rotating guard elements|
|WO1997038830A3 *||Apr 1, 1997||Mar 5, 1998||Warner Lambert Co||Shaving system with rotating guard elements|
|U.S. Classification||30/34.05, 30/32, 381/120|
|Nov 6, 1991||AS||Assignment|
Owner name: KETER PLASTIC LTD.,, ISRAEL
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNORS:SAGOL, SAMI;KEREN, BENJAMIN;LEVI, SHAI;REEL/FRAME:005910/0280
Effective date: 19911101
|Jul 2, 1996||REMI||Maintenance fee reminder mailed|
|Nov 24, 1996||LAPS||Lapse for failure to pay maintenance fees|
|Feb 4, 1997||FP||Expired due to failure to pay maintenance fee|
Effective date: 19961127